Revision 9fc33b4ac23fdcf8e2e93aacb1e9fc5842d57bf3 authored by Adrian Baddeley on 18 December 2007, 00:00:00 UTC, committed by Gabor Csardi on 18 December 2007, 00:00:00 UTC
1 parent 6db367d
bounding.box.Rd
\name{bounding.box}
\alias{bounding.box}
\title{Bounding Box of a Window or Point Pattern}
\description{
Find the smallest rectangle containing a given window(s)
or point pattern(s).
}
\usage{
bounding.box(\dots)
}
\arguments{
\item{\dots}{One or more windows (objects of class \code{"owin"}),
pixel images (objects of class \code{"im"}) or
point patterns (objects of class \code{"ppp"}).
}
}
\value{
A window (object of class \code{"owin"})
of type \code{"rectangle"} representing a rectangle.
}
\details{
This function finds the smallest rectangle (with sides parallel to
the coordinate axes) that contains all the given objects.
For a window (object of class \code{"owin"}), the bounding box
is the smallest rectangle that contains all the vertices of the
window (this is generally smaller than the enclosing frame,
which is returned by \code{\link{as.rectangle}}).
For a point pattern (object of class \code{"ppp"}), the bounding box
is the smallest rectangle that contains all the points of the pattern,
and is computed by \code{\link{bounding.box.xy}}.
For a pixel image (object of class \code{"im"}), the image will
be converted to a window using \code{\link{as.owin}},
and the bounding box of this window is obtained.
If the argument is a list of several objects, then
this function finds the smallest rectangle that contains
all the bounding boxes of the objects.
}
\seealso{
\code{\link{owin}},
\code{\link{as.owin}},
\code{\link{as.rectangle}}
\code{\link{bounding.box.xy}}
}
\examples{
w <- owin(c(0,10),c(0,10), poly=list(x=c(1,2,3,2,1), y=c(2,3,4,6,7)))
r <- bounding.box(w)
# returns rectangle [1,3] x [2,7]
w2 <- unit.square()
r <- bounding.box(w, w2)
# returns rectangle [0,3] x [0,7]
}
\author{Adrian Baddeley
\email{adrian@maths.uwa.edu.au}
\url{http://www.maths.uwa.edu.au/~adrian/}
and Rolf Turner
\email{rolf@math.unb.ca}
\url{http://www.math.unb.ca/~rolf}
}
\keyword{spatial}
\keyword{utilities}
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